MALICIOUS
152
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a study guide. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic shows a large number of outbound links, many of which are likely part of a link farm to improve search engine ranking for malicious content. The document body itself contains the malicious URL and other PDF links.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 4
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PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINKPDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARMSmall PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTALThe same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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Embedded URL info EMBEDDED_URLOne or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.URL https://ttraff.ru/wix?keyword=chromosomes+and+meiosis+study+guide
- https://static.usrfiles.com/ugd/a2d007_f0bfeab6eb6e4eb8806544b43084a999.pdf
- https://static.usrfiles.com/ugd/b8c837_f1c22cce53d44ffab0fb13b1d5cecbab.pdf
- https://static.usrfiles.com/ugd/b8c837_cc49fc282ce94bc688b41131689e017e.pdf
- https://static.usrfiles.com/ugd/b8c837_fb0b068f3bd44d729797f132ed3b1342.pdf
- https://cdn.shopify.com/s/files/1/0429/0324/0871/files/forced_adoption_support_services_operational_guidelines.pdf
- https://cdn.shopify.com/s/files/1/0434/5767/5421/files/lagafadonubezo.pdf
- https://cdn.shopify.com/s/files/1/0466/6035/4213/files/sifadufajexotinuminot.pdf
- https://cdn.shopify.com/s/files/1/0437/6448/2202/files/solar_system_facts_sheet.pdf
- https://cdn.shopify.com/s/files/1/0428/4933/7507/files/algebra_2_equations_worksheet.pdf
- https://static.usrfiles.com/ugd/97368a_1a6196ef96544be382836689e36e7ad2.pdf
- https://static.usrfiles.com/ugd/97634b_a13191bb1ce04922973832c40703e419.pdf
- https://static.usrfiles.com/ugd/7ea8bb_e400afeab6b341a0b0daf82006dd0bc5.pdf
- https://cdn.shopify.com/s/files/1/0461/7302/8505/files/ruzodujemuwexepuwenud.pdf
- https://cdn.shopify.com/s/files/1/0440/2351/3238/files/zumaxofulosora.pdf
- https://cdn.shopify.com/s/files/1/0433/9659/5870/files/birthday_cake_designs.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00005e40.bin87e0957f3a5fc578253289b676aee4f4f379f22d2f474309437ec7347e2d7197 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x5E40 | 5212 bytes |
font_01_sfnt_off00006fdc.bin4ea2515f6eaaeb0ccc659c3ab7c67ae71666c36f6c2afd7421b8921914c646b6 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x6FDC | 9932 bytes |
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